Teach Computing

Revision notes, activities, lesson plans, teaching ideas, and other resources for GCSE, A-Level, and IB Computer Science teachers and students.

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Programming languages - from Scratch to machine code

The CS Field Guide has a very comprehensive guide to different types of pro...

Assembly language simulators

There are several assembly language simulators available for use online. Si...

Little Man Computer (LMC)

The Little Man Computer (LMC) is a software simulator of a simple computer ...

Lesson - Data representation - sound

This download contains all lesson resources necessary to teach students how...

Predictive placement

Predictive placement is a feature of some CAD systems that enables more e...

AI to help emergency dispatch phone operators

The Singapore Civil Defence Force (SCDF) may trial an AI system to help tra...

Mobile Data Terminals (MDT)

MDT technology is referenced in the case study booklet, with such systems b...

CAD+911 System

TriTech Software Systems is a company that specialises in Computer Aided Di...

Spillman CAD

Spillman are another company with a range of CAD systems. Their Spillman Fl...

Resources discount offer

3.1 Advanced Theory Data representation

Click here for recommended Cambridge A-Level Computer Science textbooks.

3.1.1 User-defined data types

3.1.2 File organisation and access

3.1.3 Real numbers and normalised floating-point representation

Floating point numbers

Floating point numbers

A good explanation of why we use floating point numbers. Also covers their limitations as approximations, with good explanations of floating point rounding errors applied to real-life concepts such as currency and accounting.


Updated: 2015-06-03